Pcm Security Access Procedure
WARNING: This page is about a different car, the 2003 Ford Thunderbird. However, it is still accessible from the selected car via links, so may be relevant.
Connect scan tool to Data Link Connector (DLC). DLC is located under center of dash panel. Turn ignition on. Using scan tool, select ICM. Select ENTER SECURITY ACCESS. Wait 10 minutes for security access to be granted. Select PARAMETER RESET. Disconnect scan tool. Turn ignition off, then on, then off again. Remove key from ignition.